ECO154 --------------------------------------------------------------------------------------------------- Question: Summarization is NOT a method of collecting ___________________. Answer: Data Answer: Information Question: An ungrouped data is an array of information such that each item has its own individual frequency or ____________________. Answer: Occurrence Question: 21 – 30, 31 – 40, 41– 50, 51 – 60 etc., is the categories for which data? Answer: Grouped Question: The following information; 59.5 – 62.5 is an example of ------------ Answer: Class boundary Question: The inference about the population base on sample analysis is known as -------- Answer: inferential statistics Question: Inferential statistics can be divided into -------- Answer: 2 Question: ------ is the act of drawing inferences about a sample using the knowledge of population Answer: Deductive statistics Question: The process that involves argument from general to specific is known as ------- Answer: Deductive statistics Question: ------ is the act of drawing inferences about the population from a given analysed sample Answer: Inductive statistics Question: The plural of datum is --------- Answer: Data Question: ------- is refers to as set of usable information Answer: Data Question: There are ------ types of data collection Answer: Two (2) Question: Data could be broadly classified as -------- and Secondary data. Answer: Primary Question: -------- is the arrangement of raw numerical data in either ascending or descending order of magnitude. Answer: Array Question: A statistical table is an orderly presentation of data in -------- and Column Answer: Rows Question: If a final examination in a course is weighted 3 times as much as a quiz and a student has a final examination grade of 85 and quiz grades of 70 and 90, calculate the mean grade. Answer: 83 Question: Foremost Consulting pays its sales people N6.50, N7.50 or N8.50. The corresponding weight is 14, 10 and 2 respectively. Determine the weighted average mean. Answer: N7:04K Question: The median of a set of grouped data can be determined geometrically in two ways nam4ely, --------- and Cumulative frequency curve Answer: Histogram Question: The range is the simplest of all the measure of ---------. Answer: Dispersion Question: Standard deviation is the square root of the arithmetic mean of the sum of squares of deviation of the values in the distribution from ------------ Answer: Mean Question: A graph is a pictorial presentation of the relationship between a set of ----- Answer: Variables Question: For a mesokurtic distribution, what is K? Answer: K=0.263 Question: For a leptokurtic distribution, what is K? Answer: K>0.263 Question: For a platykurtic distribution, what is K? Answer: K<0.263 Question: When data is broken down into four equal parts or division, each part or division is called -- Answer: Quartile Question: When data is broken down into four equal parts or division, each part or division is called -- Answer: Quartile Question: Given the set of observation as 7, 12, 13, 15, 16, 17, 18, 19, 20, 25, find The lower quartile Answer: 13 Question: When data is broken down into ten equal parts or division, what is each part or division is called? Answer: Decile Question: The net weights of the content of 5 coke bottles selected at random are 85.4, 84.9, 85.3, 85.2 and 85.4. What is the arithmetic mean of the sample observation? Answer: 85.24 Question: If total weight (FX) is Σ f x = 47 and sum of units (f) is Σ f = 19, calculate Weighted point average. Answer: 2.47 Question: From a set of observation, mean = N279.76, median = N279.06, mode =N277.50 and standard deviation = s = N15.60. Find first co-efficient of skewness. Answer: 0.1448 of 0.15 Question: Given the following unit price of potato (N) 5, 7, 9, 11 and 13 and corresponding qty supplied (kg) respectively as 40, 60, 80, 100, and 120, the quantity supplied at N7 was ----- Answer: 60 Kg Question: Given the price (N) 5, 7, 9, 11 and 13 and corresponding qty supplied (kg) respectively as 40, 60, 80, 100, and 120,, what is the total expenditure if 100kg were supplied and bought? Answer: 1100 Question: Given the scores of 8 students in an examination as 12, 5, 6, 2, 14, 10, 18 and 5. estimate standard deviation Answer: 5.07 Question: In the example (21 – 30, 31 – 40, 41 – 50, 51 – 60 ...), what is the class size?
Answer: 10 Question: An ogive is also known as --------------- Answer: frequency polygon Question: Given the following array of numbers; 1,2,3,4,5.6, the mean value is ------- Answer: 3.5 Question: Given the following array of numbers; 1,2,3,4,5.6, the mean deviation value is ------ Answer: 1.5 Question: The root mean square is also known as ----------  Answer: quadratic mean Question:  The following are measure of central tendency except ---------.  Answer: mean deviation Question: If the ages of six children are; 2, 3. 5. 7.9, and 11, find the mean age. Answer: 6 years 2 month Question: ------ deals with direction of variation.  Answer: moment Question: when the origin of a moment is taken as the arithmetic mean, it is known as ------ Answer: central moment Question: Given the following array of numbers; 2, 3,4,5, and 6, calculate the first moment around the mean  Answer: 0 Question:  Given the following array of numbers; 2, 3,4,5, and 6, calculate the second moment around the mean Answer: 2 Question:  Statistics involves the careful analysis of the data collected in form of tables and the ---------. Answer: interpretation Question:  A statistical inquiry is an investigation carried out to collect information which may be analyzed and presented in the form that will aid effective -------------- .  Answer: decision-making Question:  ------- is the process of selecting from some larger set of data whose characteristics we wish to estimate.  Answer: MCmpling Question: The process of inferring from some larger set to specific MCmple is known to be -----  Answer: inductive Question:  On the basis of the MCmple, we infer things or conclude about the population. This is known as -------. Answer: Statistical Inference Question: Statistics is generally used to describe a collection of numerical data on all of the following EXCEPT?  Answer: method of teaching Question: Statistics is the science of collecting, organising, summarising and analysing information in order to draw ________.  Answer: conclusion Question: Statistics is classified as a science because it makes use of the following tools of science EXCEPT? Answer: calculation Question: One of the following is NOT an acceptable definition of statistics Answer: opinion Question:  The process of statistics can be categorised into the following stages EXCEPT?  Answer: Drawing of opinion from analysedRaw information Question:  Inferential statistics can be divided into ------- and --------- statistics. Answer: deductive , inductive Question: The act of drawing inferences about a MCmple using the general knowledge of the population is known as --------. Answer: Inductive statistics Question: ------ is a prescribed set of value. Answer: domain Question: A variable that can assume only one MCmple is called ---------  Answer: constant Question: The process that involves argument from the specific point of view to the general is known as ------- Answer: Inductive statistics Question: Variable could be categorised as -------- and --------  Answer: quantitative, qualitative Question: A variable that can assume any value between two given values is MCid to be ------- variable.  Answer: continuous Question: Quantitative variables could either be --------, and ---------  Answer: discrete, continuous Question:  ------ is a selected part of a whole Answer: MCmple Question: ----- is a circular representation of an information.  Answer: chart Question:  ------ is the number of time an event occurs. Answer: frequency Question: What is a symbol defining a class such as 41 –50 called ?  Answer: class interval Question: The end numbers 41 and 50 in (41-50) are called what?  Answer: class limits Question: What is the number of observations that fall in a class called?  Answer: data Answer: cumulative frequency Question: Quantitative variables can be classified into 2, namely, ________ and __________ Answer: Discrete and continuous variables